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A robust fault estimation scheme for a class of nonlinear systems

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journal contribution
posted on 2017-03-01, 00:00 authored by W S Chua, C P Tan, M Aldeen, Sajeeb Saha
This paper presents an observer-based robust fault estimation scheme for a class of nonlinear systems. We consider the system where the fault enters both the state and output equations via unmeasurable nonlinear functions, for which currently no fault estimation scheme exists. The proposed scheme exploits the special structures and information embedded in the fault-dependent nonlinear functions. We propose a design method to minimize the ℒ 2 gain from the disturbances to the fault estimation, and provide conditions for the existence of such observers. The effectiveness of this scheme is demonstrated on a nonlinear single-link flexible joint robot system with disturbances.

History

Journal

Asian journal of control

Volume

19

Issue

2

Pagination

799 - 804

Publisher

Wiley

Location

Milton, Qld.

ISSN

1561-8625

eISSN

1934-6093

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2016, Chinese Automatic Control Society and Wiley